Flora of North America species comparison

branched (well-developed).

few to several from base, erect or outer decumbent, 0.5–2.5 dm.

several from base, stiffly erect, (unbranched, slender), 1–2 dm.

blade suborbicular to elliptic or ovate or deltate, 0.5–2(–6.5) cm, margins entire or shallowly dentate.

blade (outer) suborbicular or ovate to elliptic, base narrowing abruptly to petiole, margins entire.

(proximal shortly petiolate, distal usually sessile);

blade narrowly elliptic or obovate, (0.5–)1–2.5(–4) cm, margins entire.

compact, (± subumbellate to densely corymbiform, elongated or not).

usually not elongated (subumbellate).

sepals ± elliptic, 4.5–7(–8.5) mm, (median pair thickened apically);

petals (sometimes white), suborbicular to obovate or obdeltate, 6.5–15 mm, (base narrowing to broad claw, apex sometimes emarginated).

(usually spreading at right angles, sometimes nearly erect, ± straight), 5–15(–20) mm, (stout).

(sessile or shortly stipitate, less than 1 mm), subglobose to broadly ellipsoid, inflated or slightly compressed (terete or subterete), (4–)5–8(–9) mm;

valves (not retaining seeds after dehiscence), glabrous;

replum as wide as or wider than fruit;

ovules 8–16 per ovary;

style 4–8(–9) mm.

flattened.

usually yellow, rarely white, 6.5–12(–14) mm, usually 1.5 times or less as long as sepals.

= 12, 24, 36, 48, 50, 72.